In photography and optics, a neutral density filter or ND filter can be a colorless (clear) or grey filter. An ideal neutral density filter reduces and/or modifies intensity of all wavelengths or colors of light equally, giving no changes in hue of color rendition.

A filter that attenuates light evenly over the visible light spectrum. It reduces the light entering a lens, thus forcing the iris to open to its maximum.

(ND Filters) Neutral Density filters can be attached to the lens of a camera to assist in preventing overexposure of an image. Prosumer camcorders have ND filters built in.

This Hoya Multi-Coated Neutral Density (ND) Filter is an essential accessory for any photographer's camera bag. ND filters reduce the amount of visible light that enters the lens, allowing the user to utilize wider apertures or slower shutter speeds, particularly in bright conditions.ND filters work especially well for portraits by allowing the photographer to reduce the depth of field, producing pleasant background blur while keeping the subject in sharp focus. These filters are also often used to emphasize movement by permitting slow shutter speeds in bright light, giving life to photos that would otherwise look frozen in time.This particular filter (HMC) is multi-coated to minimize reflection on the filter surface, which reduces flare and ghosting, and produces sharp contrast and well-balanced color. An ND8 filter reduces the amount of light by 3 stops.

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Closing time at Kensington Metropark.

Kensington Metropark, taken from north side of Martindale beach, near the water slide.

I have not the slightest clue of what the foreground object is. It looks like the top of a graduated concrete pipe with a gate over the top. I wish now I would have left it out and just caught the horizon only. I was actually thinking at the time that I had missed the sunset. I had watched a bikini contest at the Lakepoint Yacht Club in Plymouth, and stayed longer than I intended. But, I didn't expect the skies to be so nice after sunset. I also caught this on Velvia 100, but I have a few more pics left on the roll to shoot.

Shot with a cokin ND8 GND, a 4x ND 52mm ND filter1 exp, processed with UFRaw, and PP'd in GIMP.

Kop van Zuid

Second long daytime exposure picture.

And still in training :) Im getting there with a little help from my overseas fan & great photographer Jetrated.

52mm (24-70 lens) F7.0 Iso 160Exposure 30 sec almost sunset

Because the long exposure the beautifull last sunlight give a magic shine on the buildings. Sun= behind me.

The water didnt cooperate like i wanted but thats my next project :)

52mm nd filter

Neutral Density (ND) filters can reduce the intensity of light without appreciably changing its color. Classic ND filters have different f-stop reduction numbers and transmittance thus generated can be applied for different shooting conditions, such as portraiture, water falls, etc. This innovative item brings great innovation of the filter industry. Through the polarization angle modulation (rotate the filter ring when operating), this lens can change the luminous flux substantially with freedom, reducing the ND number from 2 to 400! It can easily replace dozens of all grade of density ND gray filters The filter is made of two pieces of high polarizer (HPL) which has above 99.7 polarization and a precision rotary of the wide-angle lens ring. Please note the glass of this filter is made in Japan, and it is multi-coated. (a single coated will sell at better price)..